|The Fill & Drill is a great teaching tool. Fill it with water,
and the base will stay put, while a ball on elastic cord will return
time and again to help develop strokes. When filled with water, the
base becomes heavier than any other Tennis Trainer on the market.
Very light when empty, it can be stored in players bags and taken
along. Elastic rubber cord winds around base and ball fits securely
into base pocket.|